Pressure/Vacuum Relief Applications
TC Style CB20-256 20" Pressure/Vacuum Thief Hatch
- Carbon Steel & Stainless Steel
- 20" diameter with 256 PRV
TC Style CB20-54 Pressure/Vacuum Thief Hatch
- Carbon Steel & Stainless Steel
- 20" diameter manway with 8" PRV hatch
TC Style - HC 20" full opening pressure/vacuum relieving tank hatch for bulk storage tanks
| Base | Cover | Dome | Pressure Option |
|---|---|---|---|
| 1 Cast Aluminum | 1 Cast Aluminum | 1 Plated Steel Dome | 0 1 oz. Aluminum Dome |
| 2 Cast Aluminum Dome | 0 2 oz. Steel Dome (1 oz. setting) | ||
| 2 5 oz. Steel Dome | |||
| 3 6 oz. Steel Dome | |||
| 4 8 oz. Steel Dome |
- Applications: Baghouse, food products, grain elevators, industrial products, silos
- Features: Full opening cover can be used for sampling or inspection; available with bolt-on flange only
- Pressure relief of 291 sq. in. free area and vacuum relief of 78.5 sq. in. free area
- Not for use with hazardous materials; product can be emitted when relieving pressure
- Avg. ship weight:
- HC1120 - 40 lbs.
- HC1110 - 60 lbs.
- HC1111 - 100 lbs.
- Overall height: Approx. 10 1/4"
- Vacuum setting (not adjustable): 0.5 oz./sq. in. (all models)
TC Style - HA 8" full opening pressure/vacuum relieving tank hatch
| Base | Cover | Dome | Pressure Option |
|---|---|---|---|
| 1 Steel, Weld, Straight | 1 Plated Steel | 1 Plated | 0 None |
| 2 Cast Iron, Flanged, Sloped |
- Applications: Baghouse, food products, grain elevators, industrial products, silos
- Features: Full opening cover can be used for sampling or inspection; available with bolt-on flanged base or straight weld-on base; dependable design is easy to maintain pressure relief of 46.4 sq. in. free area and vacuum relief of 15.9 sq. in. free area
- Not for use with hazardous materials; product can be emitted when relieving pressure
- Avg. ship weight:
- Flanged base - 14 lbs.
- Weld ring - 19 lbs.
- Overall height: Approx. 5 1/4" (weld base), 4 5/8" (flanged base)
- Relieves pressure at 1.5 oz./sq. in. and vacuum at 0.5 oz./sq. in.
TC Style - HH 24" full opening pressure/vacuum relieving tank hatch
| Pressure Settings | Vacuum Settings | Gasket |
|---|---|---|
| 2.0 oz. through 29 oz. | 0.5 oz. through 9 oz. | White food grade (FDA Approved) |
| (Increments of 1.0 oz.) | (Increments of 1.0 oz. after the 1.0 oz. setting) | Std. vacuum settings is 0.5 oz. |
- Applications: Baghouse, food products, grain elevators, industrial products, silos
- Features: All-aluminum contact parts eliminate corrosion; no internal hardware to contaminate products; weather hood provides protection from elements; palm nuts allow for quick, easy opening; large 24" opening provides higher venting capacity and improved access into equipment
- Avg. ship weight: 81 lbs.
- Overall height: Approx. 13"
- Warning: Cover should be inspected at least once each month to ensure proper operation and properly functioning hardware. The weather hood should be inspected for damage. Replace missing or damaged items.